Question about 95 Sea Doo XP, compression and engine wise

Hi everyone, need help from the gurus in the group.
I purchased a 95 SD XP. The guy sold it to me with supposedly burned
starter (would just click and not turn over) and he had the thing
sitting outside under a cover since last season. The hull is perfect so
I decided to buy it even if I looked at rebuilding the engine. When I
brought it in and started taking it apart I had found a thick cable
wrapped around the shaft. I decided to take the whole thing apart,
re-do the engine, pump, etc. However, when I took the engine out and
jumped the starter - it turned fine. I had measured the compression -
200psi in one cylinder and 280 in another. I took the head off - the
cylinders are practically virgin, with honing marks still there.
Pistons look good too, except for small signs of detonation around the
edge on one. Electrical parts look brand new, without even a sign of
oxidation or water, as if they were recently replaced. Electrical box
is virgin as well, brand sparking new. VTS motor however has oxidation
but still runs. I flushed the engine, sprayed fogging oil inside and
dropped a spoonfull of oil into the cylinders prior to trying to crank
it.
Now, after putting the head back on and cranking with the starter I get
200 compression in both cylinders. What could be causing it to be so
high on 720 engine?